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-rw-r--r--src/mesa/drivers/dri/i965/brw_vec4.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index dc484ba7cdf..f97de185985 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -980,6 +980,7 @@ vec4_visitor::opt_set_dependency_control()
int reg = inst->dst.nr + inst->dst.offset / REG_SIZE;
if (inst->dst.file == VGRF || inst->dst.file == FIXED_GRF) {
if (last_grf_write[reg] &&
+ last_grf_write[reg]->dst.offset == inst->dst.offset &&
!(inst->dst.writemask & grf_channels_written[reg])) {
last_grf_write[reg]->no_dd_clear = true;
inst->no_dd_check = true;
@@ -991,6 +992,7 @@ vec4_visitor::opt_set_dependency_control()
grf_channels_written[reg] |= inst->dst.writemask;
} else if (inst->dst.file == MRF) {
if (last_mrf_write[reg] &&
+ last_mrf_write[reg]->dst.offset == inst->dst.offset &&
!(inst->dst.writemask & mrf_channels_written[reg])) {
last_mrf_write[reg]->no_dd_clear = true;
inst->no_dd_check = true;